Sheathing for ships  bottoms



(No Model.)

P. INCH. SHEATHING FOR SHIPS BOTTOMS.

No. 529,651. Patented Nov. 20, 1894-;

THE uoljmls PETERS on. PHOTD-LITHO., wnsgmurom u c.

UNITED STATES PATENT OFFICE.

PHILIP INOH, OF WASHINGTON, DISTRICT OF COLUMBIA, ASSIGN OR OF EIGHT-FIFTEENTHS TO B. N. BAKER,

SHEATHING FOR OF BALTIMORE, MARYLAND.

SHIPS BOTTOMS.

SPECIFICATION forming part of Letters Patent No. 529,651, dated November20, 1894.

Original application file'd .Tune 20, 1894, Serial No. 515,142. Dividedand this application filed October 19, 1894.

Serial No. 526,387. (No specimens.)

To all whom it may concern:

7 Be it known that I, PHILIP INCH, a citizen of the United States ofAmerica, residing at Washington, in the District of Columbia,

have invented certain new and useful Improvements in Ships Bottoms, ofwhich the following is a specification.

My invention relatesto the covering of ships bottoms for the purpose ofprotecting IO them against fouling. For this purpose I use a compositionof metal set forth in an application filed by me in the United StatesPatent Office, on the 20th day of June, 1894, which application has theSerial No. 515,142, and of which this is a division.

The said composition of metal consists of a composition of tin and zinc,to which sal ammoniac is added, and in which, also is a small proportionof aluminum, when it is desired to increase the hardness or tensilestrength.

The proportions which I use and; which I have found best are as follows:I take two pounds and. two thousand one hundred and forty-threeten-thousandths (2.2143) of a pound of tin, one pound of zinc, and onehalf ounce of sal ammoniac. When aluminum is used I add to the aboveproportions about one penny-weight (avoirdupois) of aluminum. 1

0 do not confine myself to these proportions strictly, since I may varythe proportions, and still secure in some degree, the result herein setforth.

In making this composition it is better first to melt thezinc, and thenpour into it the melted tin, and afterward add the sal ammoniac,thoroughly stirring the mass If aluminum is used, I next add it in likemanner.

This composition is, by reason of its rela- 40 tive magnetic condition,suited to the bottom of iron or steel ships and other water craft, sinceit affords protection without injury or corrosion of the iron orsteel,to which it is applied. At the same time the action of the salt watercauses an exfoliation, or formation of a resultant composition on thesurface of the covering composed of my invention, to which the barnaclesor other fouling cannot adhere, but are caused toofall olf.

The method of application of my covering to the bottom of ships or otherwater craft, maybe in any of the well known ways. For example, it may beas illustrated in the accompanying drawing, in which the figure shows asection of a part of'the bottom of a ship or other water craft.

In this drawing A indicates the iron shell of the ship, and bthesheathing of my composition riveted thereto. The rivets may be of anyknown metal, but preferably of the same composition used in the covering12; but the covering may be applied in other ways, as for example,sheathing or plates may be covered with a coating of the composition,before they are put in place on the bottom of the ship.

I claim 1. In combination with the bottom of a ship or other craft acovering consisting of a composite metal composed of tin and zincprepared with sal ammoniac, substantially as described.

2. In combination with the bottom of a ship or other craft, a coveringconsisting of a composite metal composed of tin and zinc prepared withsal ammoniac, and with aluminum added thereto, substantially asdescribed.

7 In testimony whereof I affix my signature in presence of twowitnesses.

PHILIP INCH.

Witnesses:

HENRY E. COOPER, F. L. MIDDLETON.

